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For some time i was thinking about improving Reading Performance of drives with Weak heads (when you run out of donors)and i came up with some results (not finished yet) still working on it with good & improving results (but not good enough to consider it as a final result)

It is always about the material being used and the % of the mixed liquids (which am trying to figure out here)

I did some tests and here is a sample recorded video of it where you will notice the Diff. in Temp. inside & outside the container.

For some time i was thinking about improving Reading Performance of drives with Weak heads (when you run out of donors)and i came up with some results (not finished yet) still working on it with good & improving results (but not good enough to consider it as a final result)

It is always about the material being used and the % of the mixed liquids (which am trying to figure out here)

I did some tests and here is a sample recorded video of it where you will notice the Diff. in Temp. inside & outside the container.

Am ready to share my experience with anyone who worked on this research and made some progress (hope better than what i did)I think we will get to something @ the end.

Thank you

Sir , I would like to share my experience with you regarding this .

1 : The ultrasonic frequency also makes a great difference .I have seen some people say higher is better but i am sure they have really not tested it .One apprehensive thing i have in this cleaning approach is that ,The head thats suspended also does shake and could actually lead to a issue "but i am yet to see this happen " . The liquid does make a difference .Once i am done with my setup for platter cleaning which is underway i plan to make a custom CNCed tool so that i can get assistance while i am preforming this procedure .

2 : The weak performance could also be due to the fact that the platter surface is not not in the best condition .In this case cleaning the heads and installing and letting the system do a sweep butterfly test helps in platter cleaning and then taking same heads out and cleaning and repeating this few times really enhances the read/write performance .mostly if starting performance is degraded then platter are mostly 75% weak too and this method improves performance

3 : External temperature also makes a lot of difference while the task is running .I will give you a example ,Assuming we have a shrek LT drive with 4 platters and 8 heads and out of those 1 or 2 heads are really weak .So if you deselect this head and clone data of other heads and in the end you enable those 2 heads at this time the overall drive temperature is high and the same heads start behaving .In this no need to clean heads at all .

4 : Other then seagate i have had limited success tweaking rom parameters for heads .Seagate does have a Temperature adjustment feature as they call it and this does work ,But its not implemented in acelab tool which is a pity .I have had cases in seagate that have one head totally fail and i have used this tweak to read those heads and finish the case without head swap .You see these slim seagate hods mostly they are 1 platter and 2 heads and mostly 1 head is kaput .

5 : If you know the proper fiber to select ,The shape and number of a brush that you like to use for heads cleaning and also know the liquid you plan to use and your technique is good ,This approach yields better results then cleaning the heads in a ultrasonic .

PS : Regards to my senior .Just a few days back i used a special brush/liquid to clean a rosewood ST2000LM007 Top Platter Manually Although we are discussing about heads here and spend 7 hours under a microscope non stop .Result 100% data recovery from a platter that had enough metal dust spread all over the platter .I am now designing Lots of physical Data recovery tools that i plan to start selling in july and they will all be very very different from tools sold by brilliant people like hddsurgery "Lots of Love and regards to nikola sir for producing such class a products " .I am myself a user of his tools and will remain a user till like ,Tools will be to assist some of us in our physical work much different then thats being sold .I promise that this time no one will say do not buy "Made in India " Tool .All The Tools Will Be Metal And CNCed Using Ultrahigh End CNC Machines .Sometimes i feel that a thing is missing in almost all the tools i have used i hope to develop that small part also to assist us to handle those kinda tasks .I am also planning to develop some tools to help assist us in NAND Flash Work Also

I have recently started using HFE 1700 for cleaning platters and heads. It is really good, however very expensive and evaporates extremely quickly. Bit leaves little to no residue.

Well, i do not need to explain the folks out here that under 1 month of time a conclusion cannot be formed ,This guy posted here -> https://www.data-medics.com/forum/post10381.html#p10381 and in under 1 month he is giving a opinion .The only other liquid he is used in 99% isopropyl .In this thread -> https://www.data-medics.com/forum/clean ... t1271.html many people posted negative about this liquid he is saying is good .The Thing Everyone Needs To Know is That Isopropyl if opened can suck moisture like a pig and then reduces that 99% claim .You should know how to handle the moisture situation .The Recoding is Done At The Third Layer if counted from the top of platter surface

I have recently started using HFE 1700 for cleaning platters and heads. It is really good, however very expensive and evaporates extremely quickly. Bit leaves little to no residue.

Well, i do not need to explain the folks out here that under 1 month of time a conclusion cannot be formed ,This guy posted here -> https://www.data-medics.com/forum/post10381.html#p10381 and in under 1 month he is giving a opinion .The only other liquid he is used in 99% isopropyl .In this thread -> https://www.data-medics.com/forum/clean ... t1271.html many people posted negative about this liquid he is saying is good .The Thing Everyone Needs To Know is That Isopropyl if opened can suck moisture like a pig and then reduces that 99% claim .You should know how to handle the moisture situation .The Recoding is Done At The Third Layer if counted from the top of platter surface

As usual Amarbir, you do not want to listen to anyone else's opinion. You always think you are right.

Hi Tim , Leave That Lets Talk About Liquids Here .First Post a direct link of the HFE 1700 you are using .As its a series and guy can get confused ,Secondly As You Can easily source 99.9% yes not 99% but 99.9% pure isopropyl get a litter of that and try it to share your finding with us here . Please let us know what what isopropyl you have used .There is also one more intact 2 more liquids that i will tell you to use ,First send these details here i do listen to everyone .But i have experimental so intensively in physical work that some of my own methods work flawlessly .Here i posted my morning blues with a MQ01ABD series drive - > https://groups.google.com/forum/?utm_so ... -worldwide ,Sometimes i get sick with this work

I found it easy to use. It is not flammable so works well in an ultrasonic cleaner, however it has a low boiling point so you need to use a temperature adjustable cleaner or your money is just flying out the window (literally). Or indeed no additional temperature at all. I also found it good for general platter cleaning and has low residue for head cleaning duties. I know everyone uses 99.9% iso, but while expensive this is a good alternative. I will hopefully post some videos before to long comparing the two products.

1. HDD manufacturers use variety of PFPE solvents (such as HFE 7100 mentioned in this thread). The are not toxic and non-flammable.Some other solvents can be used but their are either toxic, like ccl4 or hard to store/use like iso 99.99% iso is also not very good for the job because it can react (I think) with some lubricants.

2. Cleaning the whole platter w/o re-lubrication is asking for MD, and proper lubricant deposition can only be done using PFPE solvents, not to mention that the lubricant itself is almost impossible to find.

3. Most common dirt on the heads is either plastic from the ramp or delaminating lubricant. I'm not taking into consideration physical damage of a platter. Plastic contamination has rather large particles and can be removed w/o ultrasonicRemoving delaminating lubricant from the heads is pointless w/o first removing it from the platter

And most importantly if you do all the cleaning that means you have too much of a free time

1. HDD manufacturers use variety of PFPE solvents (such as HFE 7100 mentioned in this thread). The are not toxic and non-flammable.Some other solvents can be used but their are either toxic, like ccl4 or hard to store/use like iso 99.99% iso is also not very good for the job because it can react (I think) with some lubricants.

2. Cleaning the whole platter w/o re-lubrication is asking for MD, and proper lubricant deposition can only be done using PFPE solvents, not to mention that the lubricant itself is almost impossible to find.

3. Most common dirt on the heads is either plastic from the ramp or delaminating lubricant. I'm not taking into consideration physical damage of a platter. Plastic contamination has rather large particles and can be removed w/o ultrasonicRemoving delaminating lubricant from the heads is pointless w/o first removing it from the platter

And most importantly if you do all the cleaning that means you have too much of a free time

some how i agree with you here, but the point here of my research when i have an Urgent case and have only One Donor in hand to do the joband at the end of the day, I dont have to Kill myself with toxic for some docs/images which are not mine actually

Spildit wrote:

Can you please confirm that you do get "decent" results "cleaning" dirty head(s) in order for them to read better using Chloroform ? Looks interesting ...

It does makes a Diff. but really not worth your health.. some time ago they used it in Operations Rooms (for Anesthesia) but not any more.Many experts advised me to look for Alter. its just something to know nothing more.

and thank you guys again

_________________Kuwait Data Recovery - UNIX GTCThe only reason for time is so that everything doesn't happen at once. By: Albert Einstein

(...) some time ago they used it in Operations Rooms (for Anesthesia) but not any more.(...)

This was many, many time ago like 1847 (centuries ago).... Today Chloroform is used as organic solvent only.

As for inhalational anaesthetic one would use something safer and modern like Sevoflurane. I do work on an hospital pharmacy for 20 years now and we never did use Chloroform as anaesthetic . They did use Chloroform as anaesthetic but for the wrong reasons ... Robery and kidnapping ! Like this : - https://www.cmjornal.pt/portugal/detalh ... loroformio - it was used several times in crimes to put people to sleep and even as a drug as you can smell a small quantity of it as well without dropping to sleep

Not that it matters anyway but at least on modern times let's say at least for 30-50 years or even more Chloroform is not used as anaesthetic at all on any PT hospital that i do know of.

Oh ... It might still be used as anaesthetic but for Veterinarians only (use on animals). I remember that when i was still in school we used it in biology lab to put lab rats to sleep...

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